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Transformer Riddle No.101 - BUS coupler selection
Two numbers of transformers (1600 KVA & 750 KVA ) are running  in parallel . Bus coupler is inserted in bus for different type operations. Bus Coupler rating is selected as full load current of higher rating transformer.
It is adequate or not .Explain
Author : kannan - From: India
Sun, February 16th, 2014 - 18:42
Adequate. Current through buscoupler never exceed F.L.current of highest rated transformer. 
Author : V.K.Nambiathiri - From: India
Mon, April 7th, 2014 - 18:05
Current through buscoupler never exceed F.L current of lower rated transformer and its allocated busbar, therefore buscoupler circuit breaker could be sized based on lower rated transformer. 
Author : Hamid - From: Iran
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